JPH09152173A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the operability of an air conditioner and reduce consumption power when it is operated in power saving mode. SOLUTION: The air conditioner is set so that the operation may start when a signal is received, which starts the operation of an air conditioner and if 0 is substituted in a flag F, which shows power saving mode is selected (202, N), it is set (206) so that the current, which is reduced by a specified value from a rated current value, may be supplied to an inverter circuit and 1 is substituted in the flag F (208). If the flag 1 is substituted (202, Y), while the current, which is reduced by a specified value from the rated current value, is being supplied to the inverter circuit, the air conditioner operates in heating mode (210 to 220) or in cooling mode (212 to 220). The heating operation when power saving mode is selected, lowers the setting temperature by a specified temperature every time when a specified time has elapsed. The cooling operation, when power saving mode is selected, raises the setting temperature by a specified temperature when a specified time has elapsed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, to an air conditioning operation of a room to be conditioned by a refrigeration cycle using a compressor whose operation capacity is variable. An operating capacity calculating means for calculating the operating capacity of the compressor based on the difference between the room temperature of the harmony room and the set temperature set arbitrarily, and the power consumption of the compressor does not exceed the preset power setting. In addition, the present invention relates to an air conditioner which is provided with a correction means for correcting the operating capacity and is configured to automatically change the operating capacity of the compressor according to the temperature of the room to be conditioned.

[0002]

2. Description of the Related Art Conventionally, in an air conditioner that uses a compressor (using an inverter device) whose operating capacity is variable, the current consumption of the air conditioner is detected, and this current value is based on the outlet capacity. The operating capacity of the compressor was controlled so as not to exceed the specified set current.

However, the power consumption of the air conditioner contained in household electric appliances is large, and reducing the power consumption can greatly contribute to energy saving.

As one based on such an idea, there is one described in Japanese Patent Publication No. 7-35918, and the one described in this publication is provided with a plurality of the set currents, one of which is used as an outlet. The set current was sufficiently lower than the capacity.

By selecting this low set current as necessary (power saving mode), the power consumption of the air conditioner can be suppressed and energy can be saved.

[0006]

By the way, in order to operate the air conditioner in the power saving mode, the power saving mode button must be turned on by a so-called remote controller or the like.

Therefore, after turning on the power saving mode button to stop the operation of the air conditioner that has been operating in the power saving mode, in order to operate the air conditioner again in the power saving mode, the power saving mode button must be turned on again. I have to. Therefore,
The operation when operating the air conditioner in power saving mode is troublesome.

Similarly, after stopping the operation of the air conditioner operated in the power saving mode and then operating the air conditioner again, the power saving mode button must be turned on to operate the air conditioner in the power saving mode. If you forget what you have to do, you will not be able to operate the air conditioner in power saving mode and reduce power consumption.

The present invention has been made in view of the above facts, and provides an air conditioner capable of improving operability when operating the air conditioner in a power saving mode and reducing power consumption. With the goal.

[0010]

In order to achieve the above object, the invention according to claim 1 is configured such that the refrigerating cycle using a compressor whose operating capacity can be varied enables air-conditioning operation of a room to be conditioned. An operating capacity calculating means for calculating the operating capacity of the compressor based on the difference between the room temperature of the room to be conditioned and an arbitrarily set temperature, and the power consumption of the compressor does not exceed a preset power setting. In the air conditioner configured to automatically change the operating capacity of the compressor according to the temperature of the room to be conditioned, the operating temperature of the compressor is adjusted by adjusting the operating temperature of the compressor. It comprises a changing means for changing the direction of decreasing capacity, a switch for enabling / disabling the operation of the changing means, and an initial setting means for setting the initial state of the switch to be effective at the start of the operation of the air conditioner. .

That is, when the initial state of the switch is set to be valid by the initial setting means, the setting means and the set electric power are changed by the changing means so that the operating capacity of the compressor is reduced.

As described above, when the initial state of the switch is effectively set by the initial setting means, the changing means changes the set temperature and the set electric power in the direction in which the operating capacity of the compressor is decreased, and the air conditioner is changed. When restarting the operation of the air conditioner after stopping the operation of, the set temperature and the set power can be changed in the direction of decreasing the operating capacity of the compressor without operating the switch, and the operability is improved. . Furthermore,
When the operation of the air conditioner is restarted after the operation of the air conditioner is stopped, it is possible to prevent the operation of the switch from being forgotten and increase the power consumption, so that the power consumption can be reduced.

According to a second aspect of the present invention, in the refrigerating cycle using a compressor whose operation capacity is variable, the air-conditioned room can be operated in at least a plurality of operation modes of cooling operation and heating operation. An operating capacity calculating means for calculating the operating capacity of the compressor based on the difference between the room temperature of the room to be conditioned and an arbitrarily set temperature, and the power consumption of the compressor exceeds a preset power setting. In the air conditioner configured to automatically change the operation capacity of the compressor according to the temperature of the room to be conditioned, the correction temperature is corrected so that the set temperature and the set power of the compressor are Change means for changing to a direction in which the operation capacity decreases, a switch for enabling / disabling the operation of the change means, and an initial setting means for setting the initial state of the switch to be effective at the start of operation of the air conditioner. And a, and re-correcting means for returning to the set temperature before the change of a change in the set temperature by the changing means when said operation mode is switched.

That is, when the initial setting means sets the initial state of the switch to be valid at the start of the operation of the air conditioner, the changing means changes the set temperature and the set electric power in a direction in which the operating capacity of the compressor is reduced. To be Therefore, when the operation of the air conditioner is restarted after the operation of the air conditioner is stopped, the set temperature and the set power can be changed in a direction in which the operating capacity of the compressor is reduced without operating the switch. It is possible to improve the operability, prevent the power consumption from increasing due to forgetting to operate the switch, and reduce the power consumption.

Further, according to the second aspect of the invention, when the operation mode is switched, the change of the set temperature by the changing means is returned to the set temperature before the change.

Therefore, when the operation mode is switched, it is possible to return to the normal operation without operating the switch, and the operability is improved.

The changing means may change the set temperature once or a plurality of times after the lapse of a predetermined time from the start of operation of the air conditioner, as in the invention described in claim 3.

The switch signal (valid / invalid instruction signal) from the switch may be input or received by wireless communication.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, the air conditioner according to this embodiment (hereinafter referred to as "air conditioner 10") is an indoor unit 1
2 and the outdoor unit 14, and between the indoor unit 12 and the outdoor unit 14 is a thick pipe (diameter 9.52 [mm]) refrigerant pipe 15A for circulating the refrigerant.
And a thin pipe (diameter 6.35 [mm]) of the refrigerant pipe 15B are provided, and one end of each is connected to the heat exchanger 16 in the indoor unit 12.

On the other hand, in the outdoor unit 14, the other end of one refrigerant pipe 15A is connected to the valve 18. The valve 18 is connected to a four-way valve 22 via a muffler 20A. In addition, the four-way valve 22 is connected to both sides of a pipe line to which the accumulator 24, the compressor 26 and the muffler 20B are connected, and is further connected to one of the heat exchangers 28. In addition, the other side of the heat exchanger 28 is
The other end of the refrigerant pipe 15B is connected via a heating capillary tube 30, a strainer 32, and a valve 34.

As a result, a closed refrigerant circulation path, that is, a refrigeration cycle is formed between the indoor unit 12 and the outdoor unit 14, and the operation mode is changed to the cooling mode (defrosting (drying) by switching the four-way valve 22. )mode)
Alternatively, it is switched to the heating mode. Note that FIG. 1 shows the flow of the refrigerant in each operation mode.

FIG. 2 shows a schematic structure of an electric circuit in the indoor unit 12, and FIG. 3 shows a schematic structure of an electric circuit in the outdoor unit 14.

As shown in FIG. 2, the indoor unit 12
A power supply board 38, a control board 40, and a power relay board 60A are provided in the. AC power for operating the air conditioner 10 is supplied to the power supply board 38, and a motor power supply 46 for outputting power for driving various motors in the indoor unit 12 and power for a control circuit are output. A control circuit power supply 48, a serial circuit power supply 50 that outputs electric power for the serial circuit, and a fan motor 42 (DC brushless motor, also see FIG. 1) that drives a crossflow fan that blows temperature-controlled air toward the room. A drive circuit 44 for driving is provided. The power relay board 60A is provided with a power relay 60 for opening and closing a contact 58 of a power supply circuit to the outdoor unit 14 and a temperature fuse.

The control board 40 has a serial circuit 5
2, a drive circuit 54 for driving the upper and lower flap motors 62 for adjusting the wind direction, and a serial circuit 52, a drive circuit 44,
A microcomputer (microcomputer) 56 for controlling the operation of the air conditioner 10 is connected to the driving circuit 54, and a power relay 60 is connected to the drive circuit 54 via a temperature fuse.

The drive circuit 44 changes the DC voltage supplied from the motor power source according to the signal from the microcomputer 56, and adjusts the rotation speed of the fan motor 42, that is, the amount of air blown from the indoor unit 12 by the cross flow fan. ing. For example, the supply voltage to the fan motor 42 is 12V
By changing it in 256 steps in the range of up to 36 V, it is possible to finely adjust the air flow rate. At this time, the microcomputer 56 controls the upper and lower flap motors 62 as necessary to control not only the air volume from the indoor unit 12 but also the wind direction.

Further, the microcomputer 56 displays the operating state and the operation mode of the air conditioner 10 by using an LED or the like, and also displays a self-diagnosis result on the display board 68 provided with a receiving circuit of the remote controller and a service person by lighting or blinking. Multiple service LEDs 118 for operation, operation changeover switch 1
22, room temperature sensor 74 for detecting room temperature and heat exchanger 1
A heat exchanger temperature sensor 76 for detecting the temperature of the refrigerant coil in 6 is connected.

As shown in FIG. 3, the outdoor unit 14
Is provided with a rectifier circuit 78 and a control board 80, and a terminal 82 provided on the 3P terminal board 14A.
A to 82C are 3P terminal boards 1 of the indoor unit 12, respectively.
2A is connected to terminals 84A to 84C (see FIG. 2) by wiring not shown, receives power supply, and communicates with the indoor unit 12 by the microcomputer 56.
A serial signal is transmitted / received in accordance with the control signal from the device, the frequency of the AC power supplied to the compressor 26 (for example, between 18 Hz and 150 Hz) is controlled, and the operation of each device is controlled.

A serial circuit 86 is provided on the control board 80, and a serial signal is transmitted to and received from the serial circuit 52 of the indoor unit 12. Further, the control board 80 has a plurality of noise filters 88A, 88B, 88 for removing noise.
C, a switching power supply 92 that supplies electric power to an inverter circuit 90 that drives the compressor 26, and a microcomputer 94
Is provided.

In the air conditioner 10, the frequency of driving the compressor 26 output from the inverter circuit 90 is changed to change the rotation speed of the compressor 26 to adjust the cooling / heating capacity.

The four-way valve 22 in the outdoor unit 14 is connected to the control board 80, and the four-way valve 2
The operation mode is switched by switching between the two. Further, the fan motor 96 (see also FIG. 1) of the heat exchanger 28 and the fan motor capacitor 96A are connected to the control board 80, and the microcomputer 94 of the control board 80 has an outside air temperature sensor for detecting the outside air temperature. 98A, a coil temperature sensor 98B that detects the temperature of the refrigerant coil in the heat exchanger 28, and a compressor temperature sensor 98C that detects the temperature of the compressor 26.
Is connected, while operating the fan motor 96, detecting the operating state of the compressor 26 and the outside air temperature,
The compressor 26 is driven.

FIGS. 4A and 4B show a remote controller 126 for remotely operating the air conditioner 10. The remote controller 126 is internally provided with a transmitter, a room temperature sensor, and the like, and has a display unit 128 for displaying the operating condition of the air conditioner and a switch unit 1 for performing a driving operation on its surface.
30 are provided. The switch unit 130 is provided on the front surface side of the opening / closing cover 131 with the operation / stop button 132 and various operation switches for performing simple operations.

As shown in FIG. 4B, in the switch section 130 exposed by opening the opening / closing cover 131, the power saving mode button 133, the operation switching button 134, and the temperature are set together with the operation / stop button 132. Temperature buttons 136A, 136B, wind direction button 13 for adjusting the wind direction
8. Air volume button 140 for air volume adjustment, timer buttons 142A and 142B for switching the timer on and off, on time button 144A for timer setting, and off time button 144
B, various button switches for performing detailed operation settings such as time setting buttons 144C and 144D are provided.

Normally, the air conditioner 10 has the remote controller 12
Various signals such as indoor temperature detection, cooling / heating switching, temperature setting, timer setting, etc. and operation / stop operation are performed by a signal from 6.

Next, the operation of this embodiment will be described with reference to the flowchart showing the main routine (see FIG. 5).
This routine starts when a predetermined signal is received from the remote controller and is repeatedly executed at predetermined time intervals.

For example, the operation mode is selected by the operation switching button of the remote controller 126, the temperature is set by the temperature button, etc., the operation / stop button is turned on, and when these signals are received, this routine is started. In addition,
In the present embodiment, 14 [° from 17 [° C] to 31 [° C]
It is possible to control the temperature of the room in 14 steps every 1 [° C] in the range of C].

When this routine starts, step 2
In 02, it is determined whether or not 1 is substituted in the flag F indicating whether or not the power saving mode is selected. If the power saving mode has already been selected and 1 has been assigned to the flag F, the process proceeds to step 210. If the power saving mode has not been selected and 0 has been assigned to the flag F, the process proceeds to step 204. .

In step 204, the power saving mode button 1
It is determined whether the power saving mode is selected by 33, and if the power saving mode is not selected, step 23
If the power saving mode is selected in step 2, the current value I supplied to the inverter circuit 90 is determined in step 206.
Is a value (for example, 10) obtained by reducing the rated current value I0 (for example, 15 [A]) by a predetermined amount i (for example, 5 [A]).
[A]), set 1 to the flag F in step 208, and proceed to step 210.

In step 210, it is judged whether or not the heating mode is selected. If the heating mode is selected, the process proceeds to step 214. If the heating mode is not selected, the cooling mode is selected in step 212. If the cooling mode is selected, step 22 is performed.
If the cooling mode is not selected in step 2, in step 230, another mode, for example, a dry mode,
The operation is performed in the mode of blowing only, and this routine is finished.

In step 214, it is judged whether or not the vehicle is operating in the heating mode. If the vehicle is operating in the heating mode, this routine is terminated. If the vehicle is not operating in the heating mode, step 216 is executed. Start heating mode operation,
In step 218, the process A (the routine shown in FIG. 6) is started, and in step 220, the process B (the routine shown in FIG. 7, the power saving heating operation) is started, and this routine is ended. When the process B is started, the temperature control range of the room is changed from 14 [° C] to 28 [° C] at 14 [° C.
Switch to the range of C]. The processing A and the processing B will be described later.

In step 222, it is determined whether or not the vehicle is operating in the cooling mode. If the vehicle is operating in the cooling mode, this routine is terminated. If the vehicle is not operating in the cooling mode, step 224 is executed. Start operation in cooling mode,
In step 226, the process A is started, and then step 22
In step 8, process C (the routine shown in FIG. 8, power-saving cooling operation) is started, and this routine is ended. In addition, when the process C is started, the temperature control range in the room is set to 18 [° C].
To 32 [° C] to 14 [° C].
The process C will be described later.

The heating mode started in step 216, the cooling mode started in step 224, and the other modes started in step 230 are decreased by a predetermined amount i from the rated current value I0 as described above. The electric current having the value set to the different value is supplied to the inverter circuit 90 to operate.

On the other hand, if both steps 202 and 204 are negative, it means that the power saving mode is not selected and an instruction for normal operation is given. In this case, this routine may have been previously executed to select the power saving mode, and the current value I supplied to the inverter circuit 90 may be a value obtained by reducing the rated current value I0 by a predetermined amount i. Therefore, in step 232, it is determined whether or not the current value I supplied to the inverter circuit 90 is the rated current value I0, and if the current value I is the rated current value I0,
In step 234, if the current value I is not the rated current value I0, the current value I is set to the rated current value I0 in step 236, and the process proceeds to step 234.

In step 234, the operation in the selected mode is performed, and this routine ends.

The routine described above ends even when the power is turned off. Therefore, once the power saving mode is selected and 1 is assigned to the flag F, the determination in step 202 is affirmed even when the operation is restarted after the power is turned off, and the result is supplied to the inverter circuit 90. The current value I to be maintained is maintained at a value obtained by reducing the rated current value I0 by a predetermined amount i, and the processing B (power saving heating operation) and the processing C described later are performed.
(Power saving cooling operation) is executed. Therefore, even when the power is turned off, the state of operating in the power saving mode is continued without turning on the power saving mode button 133 again, and the operability when operating the air conditioner in the power saving mode is improved.

Next, the process A will be described with reference to the flowchart shown in FIG. It should be noted that this routine is started in steps 218 and 226 as described above, and is repeatedly executed every predetermined time (for example, 1 [S]). When this routine starts, in step 238, t0 (for example, 1 [S]) is substituted into the timer counter T, and
finish. As a result, the elapsed time from the start of the heating mode or the cooling mode is substituted into the timer counter T.

The process A is reset when the power is turned off.

Next, the process B (power saving heating operation) will be described with reference to the flowchart shown in FIG. Note that this routine starts at step 220 as described above, and is repeatedly executed at predetermined time intervals. When this routine starts, it is determined in step 242 whether 1 is assigned to the flag F. That is, as will be described later, the power saving mode may be canceled during operation in the power saving mode, and in this case, 0 is assigned to the flag F. Therefore, when 0 is substituted for the flag F, the preset temperature M in the room is set to the initially set temperature M0 in step 256.
To reset this routine and terminate this routine.

On the other hand, when 1 is assigned to the flag F, at step 244, the timer counter T is t1.
(For example, 5 [minutes]) is determined. That is, it is determined whether or not t1 time has elapsed since the operation in the heating mode was started. When the timer counter T reaches t1 after the lapse of t1 time from the start of the heating mode operation, in step 246, the preset temperature M in the room is lowered by a predetermined temperature m (for example, 1 [° C]). The set value is reset as the set temperature M in the room, and this routine is finished.

If the timer counter T is not t1, at step 248, the timer counter T is t2.
(For example, 10 [minutes]) is determined. If the timer counter T is t2, step 250
Then, the value obtained by lowering the predetermined temperature m from the set temperature M in the room is reset as the set temperature M in the room, and the present routine is ended. As a result, the value obtained by lowering the initially set temperature by 2 m becomes the set temperature in the room.

Further, if the timer counter T is not t2, in step 252, the timer counter T is
Is t3 (for example, 15 [minutes]). When the timer counter T is t3, in step 254, a value obtained by lowering the preset temperature M in the room by a predetermined temperature m is reset as the preset temperature M in the room, and this routine is finished. As a result, the value that is lowered by 3 m from the initially set temperature becomes the set temperature in the room. Step 2
If the determination in 52 is negative, this routine ends.

The process B is reset when the power is turned off.

As described above, in the power-saving heating operation, the value set by lowering the preset temperature M from the preset temperature m by the preset temperature m is reset as the preset temperature M in the room every time the preset time has elapsed since the start of the heating mode operation. . That is, for example, every 5 [minutes] after the operation of the heating mode is started, the set temperature in the room is set to a temperature 1 [° C] lower than the initially set temperature. As a result, the operating load of the air conditioner is reduced, and the power consumption can be reduced.

Next, the process C (power saving cooling operation) will be described with reference to the flow chart shown in FIG. Note that this routine starts at step 220 as described above, and is repeatedly executed at predetermined time intervals. When this routine starts, in step 262, it is determined whether 1 is assigned to the flag F. That is, as will be described later, the power saving mode may be canceled during operation in the power saving mode, and in this case, 0 is assigned to the flag F. Therefore, when 0 is substituted for the flag F, in step 268, the set temperature M in the room is set to the initially set temperature M0.
To reset this routine and terminate this routine.

On the other hand, if 1 is assigned to the flag F, the timer counter T is set to t1 in step 264.
(For example, 5 [minutes]) is determined. That is, it is determined whether or not t1 time has elapsed since the operation in the cooling mode was started. When the timer counter T reaches t1 after the time t1 has elapsed from the start of the operation in the cooling mode, in step 266, the preset temperature M in the room is increased by a predetermined temperature m (for example, 1 [° C]). The set value is reset as the set temperature M in the room, and this routine is finished.

The process C is reset when the power is turned off.

As described above, in the power-saving cooling operation, the value obtained by raising the preset temperature M in the room by the preset temperature m when the preset time has elapsed after the start of the cooling mode operation is set as the preset temperature M in the room. That is, for example, when 5 [minutes] have passed since the start of the cooling mode operation, the set temperature in the room is set to a temperature 1 [° C] higher than the initially set temperature. As a result, the operating load of the air conditioner is reduced, and the power consumption can be reduced. The set temperature may be raised by a predetermined temperature every predetermined time as in the power saving heating operation. However, when the set temperature is raised by the predetermined temperature every predetermined time, the set temperature in the room should not be raised more than 2 [° C] from the initially set temperature. This is 2
This is because an increase of [° C] or more is easily felt and often felt uncomfortable.

Next, an interrupt routine which is interrupted and executed in order to perform processing such as cancellation and selection of the power saving mode while the air conditioner is in operation will be described with reference to the flow chart shown in FIG.

Power saving mode button 13 while the air conditioner is operating
3 is turned on and the signal is received, the routine starts, and in step 270, it is determined whether or not the power saving mode button 133 is turned on while the vehicle is already operating in the power saving mode. It is determined whether or not is released. If the power saving mode is released, the process proceeds to step 272. If the power saving mode is not released, in step 278, it is determined whether or not the power saving mode button 133 is turned on when not operating in the power saving mode. By doing so, it is determined whether or not the power saving mode is selected. If the power saving mode is selected, step 28
Go to 0.

If the power saving mode is not canceled or selected, that is, if the determinations at steps 270 and 278 are negative,
At step 286, other processing, for example, processing for raising or lowering the set temperature is performed, and the present routine is ended.

At step 270, since the power saving mode has been canceled, 0 is substituted for the flag F, and at step 274,
The process A executed every predetermined time is reset, the process B or the process C executed every predetermined time is reset in step 276, and this routine is finished. In step 276, the process B is reset if the heating operation is currently performed, and the process C is reset if the cooling operation is currently performed.

At step 280, the power saving mode has been selected, so 1 is substituted into the flag F, and at step 282,
The process A is started, and in step 284, the process B or the process C is started, and this routine is finished. In step 284, the process B is started if the heating operation is currently performed, and the process C is started if the cooling operation is currently performed.

Here, in the heating mode and the cooling mode, the inverter circuit 90 is fuzzy controlled. That is,
The difference between the current room temperature and the preset temperature is calculated, and the change amount of the difference per unit time is calculated.
Then, the frequency of the compressor determined in advance by the fuzzy inference rule is fetched from the map according to the difference and the change amount of the difference per unit time, and the inverter circuit 90 is controlled by this frequency.

The heating mode and the cooling mode are not limited to the fuzzy control of the inverter circuit 90.
The operation may be performed based on feedback control such as ID control.

As described above, according to this embodiment, even when the power is turned off, if the power saving mode is selected and 1 is assigned to the flag F, the inverter can be operated again. The current value I supplied to the circuit 90 is maintained at a value obtained by reducing the rated current value I0 by a predetermined amount i, and the process B (power saving heating operation) and the process C (power saving cooling operation) are executed. Therefore, even if the power is turned off,
Even if the power saving mode button 133 is not turned on, the state of operating in the power saving mode is continued, and the operability when operating the air conditioner in the power saving mode is improved and the power consumption is reduced.

In the embodiment described above, the power saving mode is canceled when the power saving mode button is turned on again during operation in the power saving mode, but the present invention is not limited to this. Further, the power saving mode may be canceled when the operation mode is switched, for example, when the heating mode is switched to the cooling mode and when the cooling mode is switched to the heating mode.

Further, in the air conditioner according to the above-mentioned embodiment, various settings such as indoor temperature detection, cooling / heating switching, temperature setting, timer setting, etc. and operation / stop operation are performed by the signal received from the remote controller 126. However, the present invention is not limited to this, and includes an operation unit connected to the air conditioner instead of the remote controller, and detects a room temperature, a heating / cooling switching, a temperature by a signal input from the operation unit. Various settings such as setting and timer setting, operation / stop operation, and the above-described control may be performed.

[0068]

As described above, according to the present invention, when the initial state of the switch is set to be valid by the initial setting means, the operating temperature of the compressor is reduced by the changing means so as to reduce the set temperature and the set power. The operating temperature of the air conditioner and then restarting the operation of the air conditioner after the operation of the air conditioner is stopped It is possible to improve operability. Furthermore, when the operation of the air conditioner is restarted after the operation of the air conditioner is stopped, it is possible to prevent the power consumption from increasing by forgetting to operate the switch.
This has the effect of reducing power consumption.

Further, when the operation mode is switched, since the change of the set temperature by the changing means is returned to the set temperature before the change, it is possible to return to the normal operation without operating the switch when the operation mode is changed. And the operability is improved.

[0070]

[Brief description of the drawings]

FIG. 1 is a schematic view of a refrigerant pipeline of an air conditioner according to this embodiment.

FIG. 2 is a schematic configuration diagram of an electric circuit of an indoor unit.

FIG. 3 is a schematic configuration diagram of an electric circuit of an outdoor unit.

FIG. 4 is a schematic external view of a remote controller.

FIG. 5 is a flowchart showing a main routine of this embodiment.

FIG. 6 is a flowchart showing a subroutine of process A of steps 218 and 226 of the main routine.

FIG. 7 is a flowchart showing a subroutine of process B of step 220 of the main routine.

FIG. 8 is a flowchart showing a subroutine of process C of step 228 of the main routine.

FIG. 9 is a flowchart showing an interrupt routine.

[Explanation of symbols]

 10 Air Conditioner 12 Indoor Unit 14 Outdoor Unit 16, 28 Heat Exchanger 26 Compressor 56, 94 Microcomputer 90 Inverter Circuit 126 Remote Controller 133 Power Saving Mode Button

Claims (3)

[Claims] 1. A refrigeration cycle using a compressor whose operating capacity is variable is configured to enable air conditioning operation of a room to be conditioned, and a difference between a room temperature of the room to be conditioned and an arbitrarily set temperature is set. The operating capacity calculation means for calculating the operating capacity of the compressor based on the above, and the correction means for correcting the operating capacity so that the power consumption of the compressor does not exceed a preset power consumption In the air conditioner configured to automatically change the operating capacity of the compressor according to the above, changing means for changing the set temperature and the set electric power in the direction in which the operating capacity of the compressor is decreased, and the operation of the changing means. An air conditioner comprising: a switch for enabling / disabling, and an initial setting means for setting an initial state of the switch to be effective when the operation of the air conditioner is started. 2. A refrigerating cycle using a compressor whose operating capacity is variable is configured so that the air-conditioned room can be operated in at least a plurality of operation modes of cooling operation and heating operation, and the room temperature of the air-conditioned room. And an operating capacity calculating means for calculating the operating capacity of the compressor based on a difference between a setting temperature arbitrarily set, and the operating capacity so that the power consumption of the compressor does not exceed a preset setting power. In an air conditioner configured to automatically change the operating capacity of the compressor according to the temperature of the room to be conditioned, the direction in which the operating capacity of the compressor is reduced by the set temperature and the set power. Change means for changing the operation of the air conditioner to valid / invalid, an initial setting means for setting the initial state of the switch to be valid at the start of operation of the air conditioner, and the operation mode An air conditioner characterized in that it comprises a re-correction means for returning to the set temperature before the change of a change in the set temperature by the changing unit when the changed Ri. 3. The air conditioner according to claim 1, wherein the changing unit changes the set temperature once or a plurality of times after a predetermined time has passed since the start of operation of the air conditioner.